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#图片仅供参考#
1．*处理单元（CPU）
CPU作为整个PLC的核心，起着总指挥的作用。CPU一般由控制电路、运算器和寄存器组成。这些电路通常都被封装在一个集成电路的芯片上。CPU通过地址总线、数据总线、控制总线与存储单元、输入输出接口电路连接。CPU的功能有以下一些：从存储器中读取指令，执行指令，取下一条指令，处理中断。
2．存储器（RAM、ROM）
存储器主要用于存放系统程序、用户程序及工作数据。存放系统软件的存储器称为系统程序存储器;存放应用软件的存储器称为用户程序存储器；存放工作数据的存储器称为数据存储器。常用的存储器有RAM、EPROM和EEPROM。RAM是一种可进行读写操作的随机存储器存放用户程序，生成用户数据区，存放在RAM中的用户程序可方便地修改。RAM存储器是一种高密度、低功耗、价格便宜的半导体存储器，可用锂电池做备用电源。掉电时，可有效地保持存储的信息。EPROM、EEPROM都是只读存储器。用这些类型存储器固化系统管理程序和应用程序。
3．输入输出单元（I/O单元）
I/O单元实际上是PLC与被控对象间传递输入输出信号的接口部件。I/O单元有良好的电隔离和滤波作用。接到PLC输入接口的输入器件是各种开关、按钮、传感器等。PLC的各输出控制器件往往是电磁阀、接触器、继电器，而继电器有交流和直流型，高电压型和低电压型，电压型和电流型。
4．电源
PLC电源单元包括系统的电源及备用电池，电源单元的作用是把外部电源转换成内部工作电压。PLC内有一个稳压电源用于对PLC的CPU单元和I/O单元供电。
5．编程器
编程器是PLC的zui重要外围设备。利用编程器将用户程序送入PLC的存储器，还可以用编程器检查程序，修改程序，监视PLC的工作状态。除此以外，在个人计算机上添加适当的硬件接口和软件包，即可用个人计算机对PLC编程。利用微机作为编程器，可以直接编制并显示梯形图。
GM Shunt Amp Motherboard GM3023A #13185
Allen Bradley Termination PC Board 1746HT #51557
Indramat Circuit Board 109-450-3201b-2 #60160
NSD V8L55-11 Sensor Controller Board #18708
Lantech Power Board VA550-011-01 CD Drive Ctrl #10528
Comstar Circuit Board Model: 8003 2102 # 42551
Allen Bradley Circuit Board 135230 #59174
New Daifuku EMC PCB Board VPB-4309 #31746
Accutrac Circuit Board UE90121, #12990
Circuit Board 1022583 Rev B #23382
Miller Circuit Board 071642, 148639B KG-33 #28063
Hyundai Circuit Board HYM532200AM-70FMA #26262
Movomatic MC Relay Unit PC 3181b Meseltron #7032
Bachmann Electronic Circuit Board GTS 12 94V0 #54453
Bachmann Electronic Circuit Board CC11/4 E06048/00 002 #54459
Siemens Communication Module 6E55 254-4UB21 #37346
Data Logic Serial Controller Board HS850B-4 #13795
Yaskawa JANCD-MRY01-3 Rev D03 Board #15253
Siemens Analog Module 6ES5243-1AB11 #29886
New ABB Memory Board 3BSC980006R89 #28907
Siemens Control Board C98043-A1054-L409 #53956
SCC COMAU Board PWB2589471-0002, REV F #31879
Sanyo PC Board A7-1-20047-1C #20805
Nematron Circuit Board 100A0529 #24020
JWF Circuit Board PNK9322B #33965
Harmo NC-DA-01 Circuit Board #23457
Felton Circuit Board X1 390530161.000.3 #17188
Barber Colman Circuit Board A-13011 #32780
US Drives 3000-4010-2100-S Control Board #6893
IDC Display Board TM84-DAD #37599
Automata VEM Digital I/O Board 0321000080 #63003
Indramat Circuit Board 109-450-3201b-6 #60163
New Conair 107-213-01 I/O PC Board #20283
Parker Hydraulic Cylinder 01.50 JJ2HLT14A, 3000 PSI #21833
Sepro Robotique 07S01008B PC Board #10065
Helm Circuit Board B10C311-4 #51045
Allen Bradley Driver Board 42305-118-55 #44486
Sterlco Display Card 785A196U #47433
National Instrument Circuit Board 3296/2C #48342
Allen Bradley X-361854 Power Address Board #27259
Allen Bradley Circuit Board 74102-312-51 #36368
JWF Circuit Board ADV9424 #33958
Reliance PC Board 0-48652, #15217
Allen Bradley Circuit Board 900443 #35795
NEW Reliance 0-51847-4 Voltage Detect VLDE #23191
Hunkar Labs 61265-05 Circuit Board #33982
Acuity Imaging PC Board LG-3 Frame Grabber, Circuit Board #21776
Adept Tech DIO Slot Card 10330-00800, Circuit Board #7624
Nissei Circuit Board TP-2049, PAN-01, NC-8000 #34136
Conair Monitor Card PC Board 107-334 #51131
Perceptron Processor Board 495-0191 Frame Grabber 29400
Allen Bradley Chassis Board for Slot Rack 960152 #46972
Hakko/Fuji Circuit Board w/ on/off C56C57 XTAL4 #15482
Indramat Circuit Board 109-450-3201b-5 #60155
Nissei Circuit Board TP-1A106, NC-8000, MOT-01 #34138
Mould Tek Feed Ctrl Board CAC-AGRFDR-2-B-9/95 #17523
Moog PC Board D122-025-A002 A Circuit Board #17140
Xymox Technologies Logic Board Control #18140
Hunkar Labs 61346.03 Circuit Board #33976
Siemens Module Simatic S7 6ES7 134-4GB52-0AB0 #55023
Octagon Systems Circuit Board IO-WLS #58174
Mattec Dual Processor CPU Board 350-0091A #13540
Reliance 0-51847-1 Voltage Level Detector Board #17282
Hunkar Labs 61349.01, HE-3-VO Circuit Board #33915
Circuit Board 4499C, 64768 #43174
Circuit Board 4498C, 64765 #43181
US Drives 3000-4000-5 PC Board #6845
Mitsubishi PC Board BN624A135H01, M-5000C #20851
Dolan Jenner Circuit Board PWA 01-022013 #47089
Dolan Jenner Circuit Board PWA 01-022109 #47095
Adept Tech Binary I/O Board 1031058010 #13991
Mitsubishi BN624A550G52 PC Board FX231D #8773
IDC Corp PC Board TM88-DAD, REV D #43672
Indramat Circuit Board 109-313-3201b-7 #60202
Indramat Circuit Board 109-313-3201b-6 #60208
Indramat Circuit Board 109-313-3201b-4 #60199
Conair Sepro Circuit Board 333004 #17306
Siemens PC Board Power Supply 6SC6100-0GB12 #53427
Helm Circuit Board B10C704-0C #51062
Balance Engineering Circuit Board BMCP 200, BE-249-577-D, REV B #43583
Honeywell Communication Module 620-0044 #13832
Allen Bradley Power Supply Circuit Board 151084, RV 01 #37255
Bachmann Electronic Circuit Board CVA500 B 2532/00 #54446
Hunkar Labs 60078, HE-3-VO Circuit Board #33909
Helm Circuit Board B10C301-2C #51058
KT-Synetics Input Isolator Board 871-21281-00 #15223
Valenite Circuit Board 766G101-L09 #49382
GSE Line Display Unit Board PC670H 40-20-21084 #23125
Barber Colman Circuit Board A-13012-901 #32782
Allen Bradley Drive Board 74102-405-53 #35786
Star Circuit Board 9736-PROID, SVC-I #37729
Circuit Board AW701-210 Rev D #29362
Hunkar Labs Monitor Interface Board 61344-01 #34031
Inducto Elphiac Circuit Board # 2EL700697 #48644
Siemens Back Plane Board 6ES5 700-2LA1, 811 0258 01 A #51710
Fuji Electric UMI5A-B PH-I Card #23199
Galil Motion Control DMC 1341 & Cable #11111
Siemens Input Module 6ES5 244-3AA13 #49645
Mitsubishi PC Board BN624A128H02, LC23C, #20844
Ranger Automation Systems Circuit Board R-IPCB1 #41746
Balance Engineering Circuit Board BMPI 110, BE-236-635-D #43584
Inducto Elphiac Circuit Board 4EL703221/C #48681
Hunkar Labs Dual 15V Regulator Board 61206-02 #34037
Fanuc Circuit Board A16B-2200-039 #60283
Reliance Electric PC Board 0-52808-2 #11293
New NSD PC Board V8L55-11 Circuit Board #13313
Mould Tek CAC-AGRFDR2-3-A11/95 Feed Ctrl Board #17518
Sanyo PC Board A7-1-30249-1B, #20769
Star PC Board 13818-PRO2A, SPC-1H-D Circuit Board #20635
Star Seiki Sequence Board 11800-PR01D, S311M, Circuit Board #5687
SCI Epic I/O D'BD PC Board 22886 #25452
Indramat Circuit Board 109-468-3201b-3 TAZ 2 #34256
Bachmann Electronic Circuit Board GTS 12 94VO 9237 #54455
Vee Arc PC Board & Key Pad 930-700, 930-602, Circuit Board #3680
Nachi PC Board UM802E Circuit Board #3692
Bachmann Electronic Circuit Board CA 16P2.5 2596/00 #54460
Allen Bradley Axis Power Board 74102-328-53 F #36163
Adept 030 Circuit Slot Card 10332-31150 #7616
Elektronik PC Board 262 1318 84 8, #6914
Yaskawa CNC Movement Control Board JANCD-MCP02-1 #15250
Muegge PC Board MW-LSCE3327-6K-006 #23028
Siemens CPU Module 6ES5 947-3UA21 #48210
NEW Reliance 0-51847-4 Voltage Detect VLDE #23191
Vickers Control Card 916339 REV D PC Board #32856
Diversified Tech PC Board 651300130 FloNet #23988
Triad Controls 31-031 Circuit Board #24328
Allen Bradley Chassis Board For Slot Rack 960152-01 #46975
Siemens Interface Module 6ES5 312-5CA11 #37350
Mattec Circuit Board 350-0100A, 350-0100F Rev E #13539
Kitamura Circuit Board 3-E98663 #60285
FTG Data System Precision Light Pen Board PXL-380 #43789
Circuit Board RKV9215B #33961
IDC Corp PC Board TM90CPU REV F #43669
Daytronic 9170 Strain Gauge Conditioner #26776
Accuray 2-066692-001 Circuit Board #26435
Accuray 9-067451-002 Circuit Board #26439
NEW Honeywell PWA Controller 30755393-502 #13850
Siemens Simodrive Board 6SC6120-0FE01 #53424
Seiko KN029DB Axis Drive Card for RT3000 Robot #23143
Helm Circuit Board B10C306-0 #51038
Metrel Circuit Board 2.01.711, 201711, #14025
Hunkar Labs 61348-03 Servo Amplifier Circuit Board #34025
Helm Circuit Board B10A333-1C #51060
Sepro 07S0095104/A P97 04 PC Board #17311
Sepro Circuit Board 07S0096304/A #17317
Sepro Circuit Board 07S00955.104/A #17304
Allen Bradley Circuit Board 90042992 #35804
Allen Bradley AC Drive Board 1336-B007-E0D-L3 #37253
American MSI Circuit Board PCB-ATC-DST-1A #43813
Allen Bradley Circuit Board 74102-568-51 #35806
PCS PC Board 2014-101 # 37987
Allen Bradley Drive Control Board 74102-347-52 #36013
Slicing Specialist Circuit Board STS-4040-CPU-512 #47633
Process Control Weigh Controller Baord C1815 #51353
Adept Tech DIO Slot Card 10332-11400 Circuit Board #7623
Powertec Circuit Board 4001-144009-501 #62883
Data Logic I/O Controller Card HS403BH #25924
Helm Circuit Board B10C947-2 #51040
Adept Processor Board 10332-11150 #35933
Sanyo PC Board A7-1-20048-1C #20809
Moog PC Board D122-025-A019, REV A, #17143
Mitsubishi PC Board BN624A083H01, LC103D, #20847
Allen Bradley Control Board Rev. 14 74102-588-51 #35779
Magnetic Power Systems 3D100-1 Circuit Board #22302
Star Circuit Board 11800-PRO4A, DXC-15 #37793
American MSI ATC-AOB PC Board PC890320 #43786
Nachi Circuit Board UM-837A PC Board #3311
New Northern Computers Control Board AD1853N-2 #55872
American MSI PCB-ATC-1/F-1A Circuit Board #43784
Siemens Servo Drive Control 6SC6108-0SG02 #53421
Mitsubishi PC Board BN624A074H03, #20840
New Muegge 82260-01550 Control Board #23025
Mould Tek Feed Ctrl Board CAC-AGRFDR2-3A-11-96 #17495
Balance Engineering Circuit Board BMCC-100 BE-236-639-D #43612
Sanyo A7-1-30235-1C Circuit Board #20832
GFM / Keba Circuit Board GVME600SC-B #31866
Cegelec Controls PC Board 20X3353A1L #18190
Star PC Board 13818-PROIA, SPC-1H-C #5880
